From eca16a3d1d9e6b2c064e0105c1015258bf2755f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Sat, 7 Oct 2017 15:44:23 +0200
Subject: [PATCH] guix package: '--upgrade' no longer reverses package order.

Reported by Oleg Pykhalov <go.wigust@gmail.com>
at <https://lists.gnu.org/archive/html/help-guix/2017-10/msg00000.html>.

* guix/scripts/package.scm (options->installable)[upgraded]: Use
'fold-right' instead of 'fold'.
---
 guix/scripts/package.scm | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm
index 4adc705220..0e365018a9 100644
--- a/guix/scripts/package.scm
+++ b/guix/scripts/package.scm
@@ -604,12 +604,12 @@ and upgrades."
     (options->upgrade-predicate opts))
 
   (define upgraded
-    (fold (lambda (entry transaction)
-            (if (upgrade? (manifest-entry-name entry))
-                (transaction-upgrade-entry entry transaction)
-                transaction))
-          transaction
-          (manifest-entries manifest)))
+    (fold-right (lambda (entry transaction)
+                  (if (upgrade? (manifest-entry-name entry))
+                      (transaction-upgrade-entry entry transaction)
+                      transaction))
+                transaction
+                (manifest-entries manifest)))
 
   (define to-install
     (filter-map (match-lambda